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    Question

    The speed of a train is 54 km/hr and it takes 14 seconds

    to cross a man. Find the time taken by train to cross a platform if the ratio of the length of the platform to the train length is 12:7.
    A 38 sec Correct Answer Incorrect Answer
    B 32 sec Correct Answer Incorrect Answer
    C 36 sec Correct Answer Incorrect Answer
    D 42 sec Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the length of train be x m. According to the question, => 54 x (5/18) = x/14 => x = 210 m Length of the platform = 210 x (12/7) = 360 m Required time = (210 + 360)/15 = 38 seconds

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